remove

Delete key-value pairs fromMapobject

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Syntax

remove(M,keySet)

Description

example

remove(M,keySet)deletes the specified keys, and the values associated with them, from the inputMapobject.

Examples

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Remove Key-Value Pair

Open Live Script

创建一个Mapobject. Display its keys and values.

ids = [437 1089 2362]; names = {'Li, N.','Jones, R.','Sanchez, C.'}; M = containers.Map(ids,names)

M = Map with properties: Count: 3 KeyType: double ValueType: char

keys(M)

ans=1×3 cell array{[437]} {[1089]} {[2362]}

values(M)

ans =1x3 cell{'Li, N.'} {'Jones, R.'} {'Sanchez, C.'}

Remove a key-value pair. Display the updated keys and values.

remove(M,2362); keys(M)

ans=1×2 cell array{[437]} {[1089]}

values(M)

ans =1x2 cell{'Li, N.'} {'Jones, R.'}

Remove Multiple Key-Value Pairs

Open Live Script

创建一个Mapobject.

months = {'Jan','Feb','Mar','Apr'}; rainfall = [327.2 368.2 197.6 178.4]; M = containers.Map(months,rainfall); keys(M)

ans =1x4 cell{'Apr'} {'Feb'} {'Jan'} {'Mar'}

values(M)

ans=1×4 cell array{[178.4000]} {[368.2000]} {[327.2000]} {[197.6000]}

To remove multiple key-value pairs, specify the keys as a cell array.

keySet = {'Feb','Mar','Apr'}; remove(M,keySet); keys(M)

ans =1x1 cell array{'Jan'}

values(M)

ans =1x1 cell array{[327.2000]}

Input Arguments

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`M`—Input`Map`object
`Map`object

InputMapobject.

`keySet`—Keys of key-value pairs to remove
numeric scalar|character vector|string scalar|cell array

Keys of the key-value pairs to remove from theMapobject, specified as a numeric scalar, character vector, string scalar, or cell array. To remove multiple key-value pairs, specifykeySetas a cell array—even when you specify the keys as numeric scalars or strings.